Quasiparticle theory of superfluid Bose systems with single-particle and pair condensates
A.S. Peletminskii and S.V. Peletminskii
National Science Center "Kharkov Institute of Physics and Technology" 1 Academicheskaya St., Kharkov 61108, Ukraine
Received December 14, 2009
A semi-phenomenological theory of superfluid Bose systems is considered on the basis of quasiparticle description.
This theory enables to describe, from the unified point of view, single-particle and pair condensates both for repulsive and attractive forces. The equations
for the order parameters describing these condensates are analyzed in the limit of weak interaction.
PACS: 67.10.–j Quantum fluids: general properties; PACS: 67.10.Fj Quantum statistical theory; PACS: 67.25.D– Superfluid phase of 4He; PACS: 67.85.Jk Other Bose–Einstein condensation phenomena.